11th Class Physics Mechanical Properties of Fluids / तरलों के यांत्रिक गुण Question Bank Mechanical Properties of Fluids Conceptual Problems

  • question_answer
    Which fall faster - big rain drops or small rain drops?

    Answer:

                    The terminal velocity of rain drops \[{{\upsilon }_{t}}=\frac{2}{9}\frac{{{r}^{2}}(\rho -\sigma )}{\eta }g\] i.e., \[{{\upsilon }_{t}}\propto {{r}^{2}}\]. Hence big drops fall faster.


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